This faucet is amazing!  The light changes colour depending on water temperature.  Blue for cold, green for warm, red for hot and flashing red when too hot to touch.  GREAT for little ones!  Teach them their colours and keep them safe.  Love it!

The battery pack hangs down inside the vanity on a wire.  The battery pack plugs into a wire attached to the underside of faucet.  Just unplug, change 4 AA batteries and plug back in like you do with your phone  charger.  Easy peasy! 

Love the waterfall too.  Will post a video when bath remodel is done.

This is a real conversation piece!